Inertial dumb bell

ABSTRACT

An inertial dumb bell includes an outer barrel and an inner barrel is provided, wherein the outer barrel has two sealed ends, at least one first vent is disposed at a position of a barrel body of the outer barrel near a front end face, and at least one second vent is disposed at a position of the barrel body of the outer barrel near a back end face; the inner barrel having two sealed ends is accommodated in the outer barrel in a relatively slidable manner, at least one balance weight member is disposed in the inner barrel, and a length of the inner barrel is smaller than a distance between the first vent and the second vent. Therefore, when a user shakes the outer barrel, the inner barrel blocks the vents on one side of the outer barrel to form a buffering effect, so as to prevent the inner barrel from generating a strong impact on the outer barrel, thereby enhancing a training effect and ensuring the use safety.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a dumb bell, more particularly to aninertial dumb bell having an inner barrel disposed in an outer barreland capable of sliding relative to the outer barrel, thereby providing ashaking training mode.

2. Related Art

For various gymnastic apparatuses commonly available in the currentmarket, for example, a bicycle gymnastic apparatus and an arm strengthtrainer, the purchasing cost is high and the volume is rather large,such that these gymnastic apparatuses are not quite suitable for commonfamily use. However, a dumb bell, having a small volume, being easy tostore, having a low price, being not limited to the space, and beingcapable of carrying out the weight training of multiple parts of thebody at any time, has become one of the most popular gymnasticapparatuses among users.

However, most of the conventional dumb bells are integrally formed andhave a fixed shape, such that when the dumb bell is held in an armlifting movement, in most cases, the center of gravity of the dumb bellis at a central position of the handhold. Therefore, the applicablegymnastic training mode is fixed, and the function of the dumb bell islimited; as a result, the user may easily lose interests, and thetraining effect is lowered.

Accordingly, in order to eliminate the above disadvantages, and make theinertial dumb bell not only provide a hold-lifting training mode, butalso provide a shaking training mode to improve the delight in use andachieve different degrees of body-building effects, the presentinvention is proposed after years of experience and continuous researchof the inventor.

SUMMARY OF THE INVENTION

The primary object of the present invention is to provide an inertialdumb bell, wherein an inner barrel capable of sliding relative to anouter barrel is disposed in the outer barrel, such that when a usershakes the outer barrel, a training load is increased through atransient acceleration generated by sliding of the inner barrel, therebyimproving the delight in use and enhancing the training effect.

Another object of the present invention is to provide an inertial dumbbell, wherein an inner barrel is disposed in an outer barrel, and ventsare respectively disposed on two sides of the outer barrel, such thatwhen the inner barrel slides and blocks the vents on one side of theouter barrel, a buffering effect is formed, so as to prevent the innerbarrel from generating a strong impact on the outer barrel, therebyenhancing the training effect and ensuring the use safety.

In order to achieve the objectives, the present invention provides aninertial dumb bell, which includes an outer barrel and an inner barrel.The outer barrel has two sealed ends, and includes a barrel body, afront end face, and a back end face. At least one first vent is disposedat a position of the barrel body near the front end face, and at leastone second vent is disposed at a position of the barrel body near theback end face. The inner barrel is accommodated in the outer barrel in arelatively slidable manner, in which front and back ends of the innerbarrel are sealed, a length of the inner barrel is smaller than adistance between the first vent and the second vent, and at least onebalance weight member is disposed in the inner barrel.

In practice, the inertial dumb bell of the present invention furtherincludes a first buffer and a second buffer. The first buffer ispositioned between the front end face of the outer barrel and the frontend of the inner barrel, and the second buffer is positioned between theback end face of the outer barrel and the back end of the inner barrel.

Other objects, advantages and novel features of the present inventionwill become more apparent from the following detailed description whentaken in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an exploded view of a part of elements according to apreferred embodiment of the present invention;

FIG. 2 is a partial combined cross-sectional view of a preferredembodiment of the present invention;

FIG. 3 is a combined cross-sectional view when a balance weight memberis accommodated in an inner barrel according to the present invention;and

FIGS. 4 and 5 are views of a using state according to a preferredembodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

FIGS. 1 and 2 show a preferred embodiment of an inertial dumb bell 1according to the present invention. Referring to FIGS. 1 and 2, theinertial dumb bell 1 includes an outer barrel 2, an inner barrel 3, afirst buffer 4, and a second buffer 5.

The outer barrel 2 includes a barrel body 21, a front head sleeve 22,and a back head sleeve 23. The barrel body 21 is in the shape of a roundtube, is hollow inside, and has a front end and a back end opposite tothe front end. The front head sleeve 22 and the back head sleeve 23 arerespectively a round plastic sleeve having an opening, the front headsleeve 22 is fitted on the front end of the barrel body 21, and the backhead sleeve 23 is fitted on the back end of the barrel body 21, so as toseal the front and back ends of the barrel body 21, and form a front endface 221 and a back end face 231 on the front and back ends of thebarrel body 21. Further, several round holes penetrating the barrel body21 are formed at positions near the front end face 221, in which theround holes are used as first vents 24; and several round holespenetrating the barrel body 21 are formed at positions near the back endface 231, in which the round holes are used as second vents 25.

The inner barrel 3 includes an inner barrel body 31, a front pipe plug32, and a back pipe plug 33. The inner barrel body 31 is in the shape ofa round tube, and is hollow inside for accommodating a sandbag used as abalance weight member 6 (as shown in FIG. 3), in which the balanceweight member 6 may also be an iron cube. The inner barrel body 31 has afront end and a back end opposite to the front end. The front pipe plug32 is fitted on the front end of the inner barrel body 31, and the backpipe plug 33 is fitted on the back end of the inner barrel body 31, soas to seal the front and back ends of the inner barrel 3, such that alength of the inner barrel 3 is smaller than a distance between thefirst vent 24 and the second vent 25.

Further, a back end of the front end face 221 of the outer barrel 2 iscombined with a round foam used as the first buffer 4, and the firstbuffer 4 is positioned between the front end face 221 of the outerbarrel 2 and the front pipe plug 32 of the inner barrel 3; and a frontend of the back end face 231 of the outer barrel 2 is combined withanother round foam used as the second buffer 5, and the second buffer 5is positioned between the back end face 231 of the outer barrel 2 andthe back pipe plug 33 of the inner barrel 3. During the implementation,the first buffer 4 and the second buffer 5 may also be springs, rubbers,plastics, or compressed air, having a buffering effect as well.

FIG. 4 is a view of a using state of the inertial dumb bell 1 accordingto the present invention. Referring to FIG. 4, the inner barrel 3 isaccommodated in the outer barrel 2, and the inner barrel 3 may sliderelative to the outer barrel 2. When a user holds the outer barrel 2 andshakes the outer barrel 2 forward, through the weight of the innerbarrel 3 and the weight of the balance weight member 6, air in the frontend of the front pipe plug 32 may be compressed and is dissipatedoutward from the first vents 24 of the outer barrel 2, and at the sametime, air out of the outer barrel 2 enters the outer barrel 2 from thesecond vents 25. As shown in FIG. 5, when the inner barrel 3 continuessliding forward, a barrel wall of the front end of the inner barrel 3seals the first vents 24, such that the residual air of the front end ofthe inner barrel 3 forms a buffering effect, and in combination with aneffect of the first buffer 4, the front pipe plug 32 of the inner barrel3 is prevented from generating a strong impact on the front end face 221of the outer barrel 2. Similarly, when the outer barrel 2 is shakenbackward, through the air of the back end of the inner barrel 3 and aneffect of the second buffer 5, the back pipe plug 33 of the inner barrel3 is prevented from impacting the back end face 231 of the outer barrel2.

Therefore, the present invention has the following advantages:

1. A hold-lifting training mode can be provided, and through anacceleration generated by sliding of an inner barrel, a training loadmay be increased, so as to provide a shaking training mode, therebyeffectively improving the delight in use and enhancing the trainingeffect.

2. When the shaking training mode is performed, air and buffers form abuffering effect, to prevent the inner barrel from generating a strongimpact on one end of an outer barrel, thereby smoothing and stabilizingthe use process, and ensuring the use safety.

According to the aforementioned disclosure, the present invention cansurely achieve the expected objectives to provide an inertial dumb bell,capable of providing not only a hold-lifting training mode but also ashaking training mode, thereby improving the delight in use andachieving different degrees of body-building effects, which undoubtedlyhas the practical value. Thus, the patent application is filed accordingto the law.

The invention being thus described, it will be obvious that the same maybe varied in many ways. Such variations are not to be regarded as adeparture from the spirit and scope of the invention, and all suchmodifications as would be obvious to one skilled in the art are intendedto be included within the scope of the following claims.

1. An inertial dumb bell, comprising: an outer barrel, having two sealedends, comprising a barrel body, a front end face, and a back end face,wherein at least one first vent is disposed at a position of the barrelbody near the front end face, and at least one second vent is disposedat a position of the barrel body near the back end face; and an innerbarrel, accommodated in the outer barrel in a relatively slidablemanner, wherein front and back ends of the inner barrel are sealed, alength of the inner barrel is smaller than a distance between the firstvent and the second vent, and at least one balance weight member isdisposed in the inner barrel.
 2. The inertial dumb bell according toclaim 1, further comprising a first buffer and a second buffer, whereinthe first buffer is positioned between the front end face of the outerbarrel and the front end of the inner barrel, and the second buffer ispositioned between the back end face of the outer barrel and the backend of the inner barrel.
 3. The inertial dumb bell according to claim 1,wherein a front head sleeve and a back head sleeve are respectivelyfitted on the two ends of the outer barrel, a front end face is formedon the front head sleeve of the outer barrel, and a back end face isformed on the back head sleeve of the outer barrel.
 4. The inertial dumbbell according to claim 1, wherein the two ends of the inner barrel arerespectively connected to a front pipe plug and a back pipe plug, forsealing the inner barrel.
 5. The inertial dumb bell according to claim2, wherein a front head sleeve and a back head sleeve are respectivelyfitted on the two ends of the outer barrel, a front end face is formedon the front head sleeve of the outer barrel, and a back end face isformed on the back head sleeve of the outer barrel.
 6. The inertial dumbbell according to claim 2, wherein the two ends of the inner barrel arerespectively connected to a front pipe plug and a back pipe plug, forsealing the inner barrel.